Figure 4.

Comparison of individual normalized maps of the distance between asymptotes (UA-LA) and SWA in baseline sleep. Left: Differences (Manhattan distances; see Methods) between all pairs of maps plotted as a gray-scale coded matrix. Smallest distances were present within individuals (diagonal). Numbers denote individuals. Right: Distribution (boxplot) of within (N = 8) and between (N = 56) subject differences (Manhattan distance). Within subject differences were significantly lower than between subject differences (notch areas do not overlap). For details about the representation of boxplots see Figure 3.

Rusterholz and Achermann BMC Neuroscience 2011 12:84   doi:10.1186/1471-2202-12-84
Download authors' original image